| | Before propensity score matching | After propensity score matching | Group 1: BIMA (n = 2067) | Group 2: IMA + SVG (n = 1206) | value | Group 1: BIMA (n = 646) | Group 2: IMA + SVG (n = 646) | Standardized difference | value |
| Age, median (IQR) | 65 (58–71) | 76 (71–79) | <0.001 | 72 (67–75) | 73 (66–77) | 0.135 | 0.013 | BMI > 30, n (%) | 580 (28.1%) | 319 (26.5%) | 0.350 | 150 (23.3%) | 192 (29.8%) | 0.148 | 0.008 | Male, n (%) | 1782 (86.2%) | 917 (76.0%) | <0.001 | 522 (80.8%) | 526 (81.4%) | 0.015 | 0.831 | NSTEMI/STEMI, n (%) | 587 (28.3%) | 439 (36.4%) | <0.001 | 212 (32.8%) | 196 (30.3%) | 0.054 | 0.369 | No. of diseased vessels, median (IQR) | 3 (2–3) | 3 (3–3) | <0.001 | 3 (3–3) | 3 (3–3) | 0.034 | 0.670 | Extracardiac artheropathy§, n (%) | 350 (16.9%) | 291 (24.2%) | <0.001 | 132 (20.4%) | 140 (21.7%) | 0.032 | 0.633 | COPD§, n (%) | 104 (5.0%) | 119 (9.9%) | <0.001 | 51 (7.9%) | 48 (7.4%) | 0.019 | 0.834 | Stroke/TIA, n (%) | 152 (7.4%) | 136 (11.3%) | 0.001 | 67 (10.4%) | 70 (10.8%) | 0.013 | 0.857 | LVEF <35%, n (%) | 83 (4.0%) | 89 (7.4%) | <0.001 | 40 (6.2%) | 37 (5.7%) | 0.021 | 0.814 | IDDM, n (%) | 192 (9.3%) | 141 (11.7%) | 0.031 | 68 (10.5%) | 64 (9.9%) | 0.020 | 0.783 | GFR<60 ml/min, n (%) | 368 (17.8%) | 460 (38.1%) | <0.001 | 191 (29.6%) | 169 (26.2%) | 0.076 | 0.192 | EuroScore II, median (IQR) | 1.2 (0.9–1.7) | 2.1 (1.5–3.38) | <0.001 | 1.56 (1.22–2.14) | 1.7 (1.30–2.47) | 0.040 | 0.020 | Urgent/emergency procedure, n (%) | 243 (11.8%) | 301 (25.0%) | <0.001 | 134 (20.7%) | 112 (17.3%) | 0.087 | 0.137 |
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BIMA, bilateral internal mammary artery; IMA, internal mammary artery; SVG, saphenous vein graft; BMI, body mass index; NSTEMI, non-ST-elevation myocardial infarction; STEMI, ST-elevation myocardial infarction; COPD chronic obstructive pulmonary disease; TIA, transient ischemic attack; LVEF, left ventricular ejection fraction; IDDM, insulin-dependent diabetes mellitus; GFR, glomerular filtration rate; EuroSCORE II, European System for Cardiac Operative Risk Evaluation II; §extracardiac atheropathy; §COPD, according to EuroSCORE definitions. Variables included for propensity score matching: age, sex, NSTEMI/STEMI, number of diseased vessels, extracardiac artheropathy, COPD, TIA/stroke, LVEF <35%, IDDM, emergency procedure, GFR <60 ml/min.
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